I have designed a circuit which has a motor-controller, a micro-controller and an LED panel ( on an aluminum PCB), now there is some noise in the signal which is causing the LEDs to light-up even when not intended. The LEDs ideally should light up when the mosfet gate which is controlled by the micro-controller closes, but that is not the case. What i believe is happening is that the noise due to the motor-controller is causing the MOSFET gate to close very slightly and complete the connection to let through some current, this current is being taken up by my LED panel. This noise signal has a pk-pk of approximately 3V, and frequency of 150kHz-1.7MHz. Please suggest me some solution.

 

MOD NOTE: You already have a thread on this topic:

https://forum.allaboutcircuits.com/...es-voltage-to-pass-when-it-is-above-2v.201741

Please, one thread per topic.